Dirt conveying duct arrangement

Details Dirt conveying duct arrangement Dirt conveying duct arrangement

1998-05-13

1999-11-16

Beisner, William H.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

15334, 15337, 15351, A47L 530

Patent

active

059834498

ABSTRACT:
A dirt conveying duct arrangement is formed between a nozzle and motor-fan of a vacuum cleaner and includes front and rear duct sections. The front duct section is open at the bottom thereof and covered by a removable bottom plate. The rear duct section is open at the top thereof and is covered by a removable top duct cover. The two-section dirt conveying duct arrangement allows clogs to be removed along the entire length thereof. The corner formed between the rear duct section and the motor-fan inlet may be molded with a radius to improve airflow into the motor-fan and limit losses in suction pressure.

REFERENCES:
patent: 4219900 (1980-09-01), Dyer
patent: 4384385 (1983-05-01), Maurer
patent: 4811450 (1989-03-01), Steadings
patent: 5351361 (1994-10-01), Buchtel
patent: 5383252 (1995-01-01), Hampton et al.
patent: 5414893 (1995-05-01), Hampton et al.
patent: 5551120 (1996-09-01), Cipolla et al.
patent: 5560074 (1996-10-01), Graham et al.
Photograph of Hoover Power Drive Vacuum Cleaner (side view of duct)--Duct Introduced.about.May 1992.
Photograph of Hoover Power Drive Vacuum Cleaner (bottom view of duct)--Duct Introduced.about.May 1992.

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